Mandrel for a toilet paper roll holder



FIG. 1 is a front elevation view of mandrel for a toilet paper roll holder showing my new design;

FIG. 2 is a top plan view thereof, the broken line showing of the toilet paper roll holder being for illustrative purposes only, the bottom being a mirror image and the rear following the contours shown;

FIG. 3 is a left end elevational view thereof;

FIG. 4 is a right end elevational view thereof. 

The ornamental design for a mandrel for a toilet paper roll holder, as shown and described. 